Comparison of a 3-D Richards equation-based model with the hillslope-storage Boussinesq model: A test case for nine characteristic hillslopes

摘要

In this study, a numerical simulation for these nine characteristic hillslopes is carried out using the three-dimensional, distributed model CATHY: a coupled model describing both subsurface flow and surface runoff. The model is capable of accurately describing flow characteristic, and thus provides us with the opportunity of studying spatially distributed phenomena like water table or storage dynamics in detail. The objective of the study is to compare the CATHY simulations with a recently developed extensions to the Boussinesq model that uses the width function to account for hillslopes shape.